US20100101292A1 - Seamless multilayer composite pipe - Google Patents
Seamless multilayer composite pipe Download PDFInfo
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- US20100101292A1 US20100101292A1 US12/530,600 US53060007A US2010101292A1 US 20100101292 A1 US20100101292 A1 US 20100101292A1 US 53060007 A US53060007 A US 53060007A US 2010101292 A1 US2010101292 A1 US 2010101292A1
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- metal pipe
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- seamless metal
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- 238000005482 strain hardening Methods 0.000 claims abstract description 15
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/22—Making metal-coated products; Making products from two or more metals
- B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
- B21C23/26—Applying metal coats to cables, e.g. to insulated electric cables
- B21C23/30—Applying metal coats to cables, e.g. to insulated electric cables on continuously-operating extrusion presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/005—Continuous extrusion starting from solid state material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
- B29C48/152—Coating hollow articles the inner surfaces thereof
Definitions
- the present invention relates to a method of manufacturing a seamless multilayer composite pipe, an apparatus for manufacturing a seamless multilayer composite pipe, and a seamless multilayer composite pipe.
- Multilayer composite pipes built up from two concentric plastic layers with an intermediate layer of aluminium, mostly an aluminium foil, are conventionally made in subsequent steps by extruding a plastic pipe, covering it with a layer of adhesive and then wrapping around it a thin sheet or foil of aluminium. Finally an additional layer of adhesive and an external layer of plastic are applied, probably by extrusion to complete the compound structure.
- the aluminium sheet or foil must be applied in transversely or obliquely overlapping fashion or be seam-welded using a TiG or a laser welding arrangement.
- Welded multilayer pipes exhibit reduced strength to hydrostatic sustained pressure due to their lower strength resulting from the welded metal layer.
- the quality of the welded metal tube is controlled with difficulty as far as the resultant fusion strength is concerned, so these tubes exhibit an increased probability to develop welding failures (hidden defects), hence a decreased local strength.
- the present invention was made to overcome the above-mentioned drawbacks.
- the above-mentioned object is attained by a first aspect concerning a method of manufacturing a seamless multilayer composite pipe, by a second aspect relating to an apparatus for manufacturing a seamless multilayer composite pipe, and a third aspect providing a seamless multilayer composite pipe.
- the first aspect of the present invention concerns a method of manufacturing a seamless multilayer composite pipe comprising the steps of a) providing a seamless metal pipe with at least one continuous layer covering its inner surface, and b) passing the seamless metal pipe through a unit in order to reduce the diameter of the seamless metal pipe by cold working.
- the method for manufacturing a multilayer composite pipe does not require complicated apparatus for manufacturing, involves simpler processing steps and is capable of increased output rates and reduced manufacturing costs.
- the method of manufacturing a seamless multilayer composite pipe comprises in step a), wherein the seamless metal pipe is provided with at least one continuous layer covering its inner surface, the further steps of a1) adjusting a distance d between a hot-extrusion die and a co-extrusion head in the direction of extrusion of the seamless metal pipe; a2) feeding metal material to the hot-extrusion die; a3) feeding adhesive material through a channel and feeding material for the continuous layer through a channel to the co-extrusion head; a4) extruding the metal material through the hot-extrusion die and cooling the hot seamless metal pipe through its external surface; and a5) co-extruding the adhesive material and the material for the continuous layer through the co-extrusion head onto the inner surface of the cooled seamless metal pipe, simultaneously to extruding the seamless metal pipe.
- the method of manufacturing a seamless multilayer composite pipe comprises in step a), wherein the seamless metal pipe is provided with at least one continuous layer covering its inner surface, the further steps of a6) adjusting a distance d between a hot-extrusion die and a co-extrusion head; a7) feeding metal material to the hot-extrusion die in the direction of extrusion of the seamless metal pipe; a8) feeding adhesive material through a channel and feeding a pre-extruded pipe-shaped layer to the co-extrusion head; a9) extruding the metal material through the hot-extrusion die and cooling the hot seamless metal pipe through its external surface; and a10) extruding the adhesive material through the co-extrusion head onto the inner surface of the cooled seamless metal pipe, simultaneously to extruding the seamless metal pipe.
- the at least one continuous layer is made of a plastic material in the method for manufacturing a multilayer composite pipe.
- step b) subsequent to step b) a further step c) of co-extruding an adhesive material and a material for an outer layer through a respective extrusion head onto the outer surface of the seamless metal pipe may be carried out.
- an apparatus for manufacturing a seamless multilayer composite pipe comprises a unit for providing a seamless metal pipe with at least one continuous layer covering its inner surface, and a unit for reducing the diameter of the seamless metal pipe by cold working.
- the apparatus for manufacturing a seamless multilayer composite pipe is no complicated apparatus and can manufacture a seamless multilayer composite pipe at a reduced cost for all the required sizes compared with the pipes of this kind known so far.
- the unit for providing the seamless metal pipe with the at least one continuous layer covering its inner surface is comprised of a hot-extrusion die for extruding a metal material into a pipe shape, a tube shaped supporting member comprising, in its interior, a channel for adhesive hot melt, a channel for the material for the continuous layer, and a channel for air supply, the channels being provided concentrically in this order from the outside to the inside, the tube shaped supporting member serving for guiding and supporting the as-extruded seamless metal pipe, a cooling tube provided around the tube shaped supporting member for guiding and supporting the hot seamless metal pipe, and a co-extrusion head, which is located in the direction of extrusion at the end of the tube shaped supporting member, the distance d between the hot-extrusion die and the co-extrusion head being adjustable depending on the technical requirements, and the length of the cooling tube being adaptable to the distance d.
- the unit for providing the seamless metal pipe with the at least one continuous layer covering its inner surface is comprised of a hot-extrusion die for extruding a metal material into a pipe shape, a tube shaped supporting member comprising, in its interior, a channel for adhesive hot melt, and a channel for air supply, the channels being provided concentrically in this order from the outside to the inside, the tube shaped supporting member serving for guiding and supporting the as-extruded seamless metal pipe, a cooling tube provided around the tube shaped supporting member for guiding and supporting the hot seamless metal pipe, and a co-extrusion head, which is located in the direction of extrusion at the end of the tube shaped supporting member, the distance d between the hot-extrusion die and the co-extrusion head being adjustable depending on the technical requirements, and the length of the cooling tube being adaptable to the distance d.
- the unit for reducing the diameter of the seamless metal pipe by cold working is a sinking die provided at a predetermined distance from the co-extrusion head.
- the third aspect of the present invention is a seamless multilayer composite pipe comprising a seamless metal pipe with at least one continuous layer covering its inner surface, wherein the continuous layer covering the inner surface of the a seamless metal pipe is mechanically compressed.
- the multilayer composite pipe can be produced in all standard sizes for any fluid transporting application, such as hydraulic installations, under-floor and other heating systems, etc.
- non-standard sizes can also be made to meet specific requirements.
- FIG. 1 is a scheme showing a seamless multilayer composite pipe 1 according to a preferred embodiment of the present invention.
- FIG. 2 is a schematic diagram illustrating one example of an apparatus 100 for manufacturing a seamless multilayer composite pipe 1 according to the present invention.
- FIG. 3 shows the cross section at the line A-A of the apparatus 100 illustrated in FIG. 2 .
- FIG. 4 is a detailed view showing the co-extrusion head 107 of the apparatus 100 illustrated in FIG. 2 .
- FIG. 5 is a detailed view showing the sinking die 109 of the apparatus 100 illustrated in FIG. 2 .
- FIG. 6 is a schematic diagram illustrating another example of an apparatus 200 for manufacturing a seamless multilayer composite pipe 1 according to the present invention.
- FIG. 7 shows the cross section at the line B-B of the apparatus 200 illustrated in FIG. 6 .
- FIG. 8 is a detailed view showing the co-extrusion head 207 of the apparatus 200 illustrated in FIG. 6 .
- FIG. 9 is a detailed view showing the sinking die 209 of the apparatus 200 illustrated in FIG. 6 .
- FIG. 10 shows a particular modification of the apparatus 100 , 200 of FIG. 2 or FIG. 6 .
- the method of manufacturing a seamless multilayer composite pipe 1 comprises the steps of
- step a) the seamless metal pipe 3 is provided with at least one continuous layer 5 covering its inner surface by the further steps of
- step a) the seamless metal pipe 3 is provided with at least one continuous layer 5 covering its inner surface by the further steps of
- the at least one continuous layer ( 5 ) is preferably made of a plastic material.
- step b) a further step c) of co-extruding an adhesive material and a material for an outer layer 7 through a respective extrusion head onto the outer surface of the seamless metal pipe 3 may be carried out.
- the metal material is extruded in steps a4) and a9), respectively, at substantially melting temperature.
- this metal material is preferably an aluminium-based material. More preferably, the aluminium-based material is extruded in steps a4) and a9), respectively, at a temperature of about 500° C.
- the cooling of the hot seamless metal pipe 3 in steps a4) and a9), respectively, through its external surface by, for instance, forced convection is preferably carried out within a temperature range of 140° C. to 240° C. Moreover, this cooling is preferably achieved by a specially designed cooling tube comprising internal spray nozzles and/or spray passages.
- steps a5) and a10) co-extrude the adhesive material and plastic material in steps a5) and a10), respectively, at substantially melting temperature.
- the preferred temperature range for the co-extruding in steps a5) and a10) is from 150° C. to 250° C.
- the plastic material may be selected from the group comprising polyethylene (PE), polyethylene of raised temperature resistance (PE-RT), cross-linked polyethylene (PE-X), polypropylene (PP), random polypropylene (PP-R).
- metal deactivator additives and / or flame retardant additives may be added to the polymer composition.
- the adhesive material is a mix of linear low density polyethylene (LLDPE) and a metal deactivator additive.
- the adhesive component forming the intermediate adhesive layer has maleic anhydride functionality that imparts polar characteristics to the non-polar PE base resin.
- Maleic anhydride bonds to metal substrates by creating both covalent and hydrogen bonds.
- Metal substrates generate oxides on the surface. These oxides are further hydrolysed with water to form hydroxyl groups on the metal surface.
- Maleic anhydride creates an ester linkage (covalent bonding) to the OH groups on the surface. When maleic anhydride rings open, they generate carboxyl groups. These carboxyl groups bond to the oxides and the hydroxides on the metal surface with hydrogen bonds.
- a mechanical etching of the inner surface of the seamless metal pipe 3 may be performed subsequent to steps a4) and a9), respectively, and in advance of steps a5) and a10), respectively.
- an etching tool (scraper) 301 etches (scrapes) the inner surface of the as extruded seamless metal pipe 3 so as to increase the surface roughness.
- a similar mechanical etching step may be conducted subsequent to step b) and in advance of step c).
- the structure of the apparatus 100 , 200 for manufacturing a seamless multilayer composite pipe 1 will be described in the following with reference to the illustrations of FIG. 2 to FIG. 5 , and FIG. 6 to FIG. 9 , respectively.
- the apparatus 100 , 200 for manufacturing a seamless multilayer composite pipe 1 comprises a unit for providing a seamless metal pipe 3 with at least one continuous layer 5 covering its inner surface, and a unit 109 , 209 for reducing the diameter of the seamless metal pipe 3 by cold working.
- the unit for providing the seamless metal pipe 3 with the at least one continuous layer 5 covering its inner surface is comprised of
- a hot-extrusion die 101 for extruding a metal material into a pipe shape
- a tube shaped supporting member 103 comprising, in its interior, a channel 111 for adhesive hot melt, a channel 113 for the material for the continuous layer 5 , and a channel 115 for air supply, the channels 111 , 113 , 115 being provided concentrically in this order from the outside to the inside, the tube shaped supporting member 103 serving for guiding and supporting the as-extruded seamless metal pipe 3 ,
- a cooling tube 105 provided around the tube shaped supporting member 103 for guiding and supporting the hot seamless metal pipe 3 , and
- a co-extrusion head 107 which is located in the direction of extrusion at the end of the tube shaped supporting member 103 , the distance d between the hot-extrusion die 101 and the co-extrusion head 107 being adjustable depending on the technical requirements, and the length of the cooling tube 105 being adaptable to the distance d.
- the co-extrusion head 107 By the co-extrusion head 107 the adhesive hot melt and the material for the continuous layer 5 are applied onto the inner surface of the seamless metal pipe 3 through the channels 111 and 113 , respectively. A detailed view of the co-extrusion head 107 is given in FIG. 4 .
- the unit for providing the seamless metal pipe 3 with the at least one continuous layer 5 covering its inner surface is comprised of a hot-extrusion die 201 for extruding a metal material into a pipe shape,
- a tube shaped supporting member 203 comprising, in its interior, a channel 211 for adhesive hot melt and a channel 215 for air supply, the channels 211 , 215 being provided concentrically in this order from the outside to the inside, the tube shaped supporting member 203 serving for guiding and supporting the as-extruded seamless metal pipe 3 , as illustrated in FIG. 7 ,
- a cooling tube 205 provided around the tube shaped supporting member 203 for guiding and supporting the hot seamless metal pipe 3 , and
- a co-extrusion head 207 which is located in the direction of extrusion at the end of the tube shaped supporting member 203 , the distance d between the hot-extrusion die 201 and the co-extrusion head 207 being adjustable depending on the technical requirements, and the length of the cooling tube 205 being adaptable to the distance d.
- a pre-extruded layer (preferably a plastic pipe) is supplied to the extrusion head 207 in the centre of the tube shaped supporting member 203 .
- the adhesive hot melt is applied onto the inner surface of the seamless metal pipe 3 through the channel 211 .
- a detailed view of the extrusion head 207 is given in FIG. 8 .
- the adjustment of the distance d of the co-extrusion head 107 , 207 with respect to the hot-extrusion die 101 , 201 depends on the degree of the external cooling. For instance, if the temperature of the seamless metal pipe is above a desired range, either the co-extrusion head 107 , 207 may be moved further down in the direction of the extrusion, or the cooling rate of the cooling tube 105 , 205 may be increased, or both measures may be performed.
- the tube shaped supporting member 103 , 203 is preferably made of metal.
- the tube shaped supporting member 103 , 203 and the co-extrusion head 107 , 207 may also act as calibration means for the inner diameter of the extruded seamless metal pipe 3 if they are sized so that they are in contact with the inner surface of the seamless metal pipe 3 .
- a unit 109 , 209 for reducing the diameter of the seamless metal pipe 3 by cold working is provided.
- This unit is preferably a sinking die.
- a detailed view showing the sinking die 109 is given in FIG. 5
- a detailed view showing the sinking die 209 is given in FIG. 9 .
- another extrusion device may be provided for applying the continuous layer 7 onto the outer surface of the seamless metal pipe 3 .
- an etching tool (scraper) 301 may be provided subsequent to the hot-extrusion die 101 , 201 , as shown in FIG. 10 , in order to mechanically etch the inner surface of the seamless metal pipe 3 so as to increase its roughness.
- a similar etching tool (not shown) may be provided subsequent to the unit 109 , 209 for mechanically etching the outer surface of the seamless metal pipe 3 .
- the multilayer composite pipe 1 comprises a seamless metal pipe 3 with at least one continuous layer 5 covering its inner surface, wherein the continuous layer 5 covering the inner surface of the a seamless metal pipe 3 is mechanically compressed.
- the seamless multilayer composite pipe 1 is subjected after its manufacture to cold working in order to reduce the diameter of the seamless metal pipe 3 so as to obtain a desired dimension.
- the continuous layer 5 is preferably made of plastic.
- an adhesive layer 9 a may be provided therebetween.
- Aluminium or an aluminium alloy is preferably used for the seamless metal pipe 3 .
- the aluminium or aluminium alloy is suitably selected from the 1000 series (e.g., 1050, 1070, etc.), 3000 series (e.g., 3003, 3103, etc.) 6000 series (e.g., 6060, 6061, etc.) and 8000 series (e.g. 8011, etc.).
- a continuous layer 7 preferably of plastic, covering the outer surface may be provided on the seamless metal pipe 3 .
- this continuous layer 7 is adhered to the outer surface of the seamless metal pipe 3 via an adhesive layer 9 b.
- a preferred embodiment of the seamless multilayer composite pipe 1 is shown in FIG. 1 .
- the method of manufacturing a seamless multilayer composite pipe 1 according to the present invention is simple, involves fewer steps and avoids complicated precision operations such as wrapping and welding, resulting in a significant reduction of production costs.
- the seamless multilayer composite pipe 1 can be produced in indefinite lengths to suit any requirements.
- each of the layers especially that of the seamless meta pipe 3 , can be produced within a wider range of values than by the known methods.
- the co-extrusion head 107 , 207 applying the inner layer of plastic may be mounted adjustably in the direction of extrusion so as to allow application of the plastic material at the point where the temperature of the seamless metal pipe 3 has dropped to an acceptable level.
- the seamless multilayer composite pipe 1 can be made flexible or rigid, depending on specific requirements by choosing the thickness for each of the coaxial layers, as well as choosing the amount of cold working during the sinking pass.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
- The present invention relates to a method of manufacturing a seamless multilayer composite pipe, an apparatus for manufacturing a seamless multilayer composite pipe, and a seamless multilayer composite pipe.
- Multilayer composite pipes built up from two concentric plastic layers with an intermediate layer of aluminium, mostly an aluminium foil, are conventionally made in subsequent steps by extruding a plastic pipe, covering it with a layer of adhesive and then wrapping around it a thin sheet or foil of aluminium. Finally an additional layer of adhesive and an external layer of plastic are applied, probably by extrusion to complete the compound structure.
- To ensure strength and stability of the metal layer, the aluminium sheet or foil must be applied in transversely or obliquely overlapping fashion or be seam-welded using a TiG or a laser welding arrangement. These lead in turn to excessive use of metal, complicated machinery, the need for skilled operators and reduced output rates, resulting in higher production costs.
- Welded multilayer pipes exhibit reduced strength to hydrostatic sustained pressure due to their lower strength resulting from the welded metal layer. In addition, the quality of the welded metal tube is controlled with difficulty as far as the resultant fusion strength is concerned, so these tubes exhibit an increased probability to develop welding failures (hidden defects), hence a decreased local strength.
- The present invention was made to overcome the above-mentioned drawbacks.
- It is therefore an object of the present invention to provide an improved method of manufacturing a seamless multilayer composite pipe, an advanced apparatus for manufacturing a seamless multilayer composite pipe, and an improved seamless multilayer composite pipe.
- This object of the present invention is achieved by the respective subject-matter of the appended independent claims. Further advantageous developments are set forth in the dependent claims.
- In detail, the above-mentioned object is attained by a first aspect concerning a method of manufacturing a seamless multilayer composite pipe, by a second aspect relating to an apparatus for manufacturing a seamless multilayer composite pipe, and a third aspect providing a seamless multilayer composite pipe.
- The first aspect of the present invention concerns a method of manufacturing a seamless multilayer composite pipe comprising the steps of a) providing a seamless metal pipe with at least one continuous layer covering its inner surface, and b) passing the seamless metal pipe through a unit in order to reduce the diameter of the seamless metal pipe by cold working.
- According to this first aspect, the method for manufacturing a multilayer composite pipe does not require complicated apparatus for manufacturing, involves simpler processing steps and is capable of increased output rates and reduced manufacturing costs.
- In a preferred embodiment of the first aspect of the present invention, the method of manufacturing a seamless multilayer composite pipe comprises in step a), wherein the seamless metal pipe is provided with at least one continuous layer covering its inner surface, the further steps of a1) adjusting a distance d between a hot-extrusion die and a co-extrusion head in the direction of extrusion of the seamless metal pipe; a2) feeding metal material to the hot-extrusion die; a3) feeding adhesive material through a channel and feeding material for the continuous layer through a channel to the co-extrusion head; a4) extruding the metal material through the hot-extrusion die and cooling the hot seamless metal pipe through its external surface; and a5) co-extruding the adhesive material and the material for the continuous layer through the co-extrusion head onto the inner surface of the cooled seamless metal pipe, simultaneously to extruding the seamless metal pipe.
- In another preferred embodiment of the first aspect of the present invention, the method of manufacturing a seamless multilayer composite pipe comprises in step a), wherein the seamless metal pipe is provided with at least one continuous layer covering its inner surface, the further steps of a6) adjusting a distance d between a hot-extrusion die and a co-extrusion head; a7) feeding metal material to the hot-extrusion die in the direction of extrusion of the seamless metal pipe; a8) feeding adhesive material through a channel and feeding a pre-extruded pipe-shaped layer to the co-extrusion head; a9) extruding the metal material through the hot-extrusion die and cooling the hot seamless metal pipe through its external surface; and a10) extruding the adhesive material through the co-extrusion head onto the inner surface of the cooled seamless metal pipe, simultaneously to extruding the seamless metal pipe.
- Preferably, the at least one continuous layer is made of a plastic material in the method for manufacturing a multilayer composite pipe.
- Further, in the method for manufacturing a multilayer composite pipe, subsequent to step b) a further step c) of co-extruding an adhesive material and a material for an outer layer through a respective extrusion head onto the outer surface of the seamless metal pipe may be carried out.
- In the second aspect of the present invention, an apparatus for manufacturing a seamless multilayer composite pipe comprises a unit for providing a seamless metal pipe with at least one continuous layer covering its inner surface, and a unit for reducing the diameter of the seamless metal pipe by cold working.
- According to this second aspect, the apparatus for manufacturing a seamless multilayer composite pipe is no complicated apparatus and can manufacture a seamless multilayer composite pipe at a reduced cost for all the required sizes compared with the pipes of this kind known so far.
- In a preferred embodiment of the second aspect of the present invention, in the apparatus for manufacturing a seamless multilayer composite pipe the unit for providing the seamless metal pipe with the at least one continuous layer covering its inner surface is comprised of a hot-extrusion die for extruding a metal material into a pipe shape, a tube shaped supporting member comprising, in its interior, a channel for adhesive hot melt, a channel for the material for the continuous layer, and a channel for air supply, the channels being provided concentrically in this order from the outside to the inside, the tube shaped supporting member serving for guiding and supporting the as-extruded seamless metal pipe, a cooling tube provided around the tube shaped supporting member for guiding and supporting the hot seamless metal pipe, and a co-extrusion head, which is located in the direction of extrusion at the end of the tube shaped supporting member, the distance d between the hot-extrusion die and the co-extrusion head being adjustable depending on the technical requirements, and the length of the cooling tube being adaptable to the distance d.
- In another preferred embodiment of the second aspect of the present invention, in the apparatus for manufacturing a seamless multilayer composite pipe the unit for providing the seamless metal pipe with the at least one continuous layer covering its inner surface is comprised of a hot-extrusion die for extruding a metal material into a pipe shape, a tube shaped supporting member comprising, in its interior, a channel for adhesive hot melt, and a channel for air supply, the channels being provided concentrically in this order from the outside to the inside, the tube shaped supporting member serving for guiding and supporting the as-extruded seamless metal pipe, a cooling tube provided around the tube shaped supporting member for guiding and supporting the hot seamless metal pipe, and a co-extrusion head, which is located in the direction of extrusion at the end of the tube shaped supporting member, the distance d between the hot-extrusion die and the co-extrusion head being adjustable depending on the technical requirements, and the length of the cooling tube being adaptable to the distance d.
- Preferably, the unit for reducing the diameter of the seamless metal pipe by cold working is a sinking die provided at a predetermined distance from the co-extrusion head.
- The third aspect of the present invention is a seamless multilayer composite pipe comprising a seamless metal pipe with at least one continuous layer covering its inner surface, wherein the continuous layer covering the inner surface of the a seamless metal pipe is mechanically compressed.
- According to the above objects of the present invention, the multilayer composite pipe can be produced in all standard sizes for any fluid transporting application, such as hydraulic installations, under-floor and other heating systems, etc. However, non-standard sizes can also be made to meet specific requirements.
-
FIG. 1 is a scheme showing a seamless multilayer composite pipe 1 according to a preferred embodiment of the present invention. -
FIG. 2 is a schematic diagram illustrating one example of anapparatus 100 for manufacturing a seamless multilayer composite pipe 1 according to the present invention. -
FIG. 3 shows the cross section at the line A-A of theapparatus 100 illustrated inFIG. 2 . -
FIG. 4 is a detailed view showing theco-extrusion head 107 of theapparatus 100 illustrated inFIG. 2 . -
FIG. 5 is a detailed view showing thesinking die 109 of theapparatus 100 illustrated inFIG. 2 . -
FIG. 6 is a schematic diagram illustrating another example of anapparatus 200 for manufacturing a seamless multilayer composite pipe 1 according to the present invention. -
FIG. 7 shows the cross section at the line B-B of theapparatus 200 illustrated inFIG. 6 . -
FIG. 8 is a detailed view showing theco-extrusion head 207 of theapparatus 200 illustrated inFIG. 6 . -
FIG. 9 is a detailed view showing thesinking die 209 of theapparatus 200 illustrated inFIG. 6 . -
FIG. 10 shows a particular modification of theapparatus FIG. 2 orFIG. 6 . - The method of manufacturing a seamless multilayer composite pipe 1 comprises the steps of
- a) providing a
seamless metal pipe 3 with at least onecontinuous layer 5 covering its inner surface, and - b) passing the
seamless metal pipe 3 through aunit seamless metal pipe 3 by cold working. - In this method of manufacturing a seamless multilayer composite pipe 1, as a first alternative, in step a) the
seamless metal pipe 3 is provided with at least onecontinuous layer 5 covering its inner surface by the further steps of - a1) adjusting a distance d between a hot-
extrusion die 101 and aco-extrusion head 107 in the direction of extrusion of theseamless metal pipe 3; - a2) feeding metal material to the hot-extrusion die 101;
- a3) feeding adhesive material through a
channel 111 and feeding material for thecontinuous layer 5 through achannel 113 to theco-extrusion head 107; - a4) extruding the metal material through the hot-
extrusion die 101 and cooling the hotseamless metal pipe 3 through its external surface; - a5) co-extruding the adhesive material and the material for the
continuous layer 5 through the co-extrusion head (107) onto the inner surface of the cooledseamless metal pipe 3, simultaneously to extruding theseamless metal pipe 3. - As a second alternative, in the above method of manufacturing a seamless multilayer composite pipe 1, in step a) the
seamless metal pipe 3 is provided with at least onecontinuous layer 5 covering its inner surface by the further steps of - a6) adjusting a distance d between a hot-extrusion die 201 and a
co-extrusion head 207 in the direction of extrusion of theseamless metal pipe 3; - a7) feeding metal material to the hot-extrusion die 201;
- a8) feeding adhesive material through a
channel 211 and feeding a pre-extruded pipe-shaped layer 217 to theco-extrusion head 207; - a9) extruding the metal material through the hot-extrusion die 201 and cooling the hot
seamless metal pipe 3 through its external surface; - a10) extruding the adhesive material through the co-extrusion head 20) onto the inner surface of the cooled
seamless metal pipe 3, simultaneously to extruding theseamless metal pipe 3. - In the above method of manufacturing a seamless multilayer composite pipe 1, the at least one continuous layer (5) is preferably made of a plastic material.
- Furthermore, subsequent to step b) a further step c) of co-extruding an adhesive material and a material for an
outer layer 7 through a respective extrusion head onto the outer surface of theseamless metal pipe 3 may be carried out. - Preferably, the metal material is extruded in steps a4) and a9), respectively, at substantially melting temperature. Moreover, this metal material is preferably an aluminium-based material. More preferably, the aluminium-based material is extruded in steps a4) and a9), respectively, at a temperature of about 500° C.
- The cooling of the hot
seamless metal pipe 3 in steps a4) and a9), respectively, through its external surface by, for instance, forced convection is preferably carried out within a temperature range of 140° C. to 240° C. Moreover, this cooling is preferably achieved by a specially designed cooling tube comprising internal spray nozzles and/or spray passages. - It is preferred to co-extrude the adhesive material and plastic material in steps a5) and a10), respectively, at substantially melting temperature. The preferred temperature range for the co-extruding in steps a5) and a10) is from 150° C. to 250° C.
- The plastic material may be selected from the group comprising polyethylene (PE), polyethylene of raised temperature resistance (PE-RT), cross-linked polyethylene (PE-X), polypropylene (PP), random polypropylene (PP-R).
- Moreover, metal deactivator additives and / or flame retardant additives may be added to the polymer composition.
- The adhesive material is a mix of linear low density polyethylene (LLDPE) and a metal deactivator additive. The adhesive component forming the intermediate adhesive layer has maleic anhydride functionality that imparts polar characteristics to the non-polar PE base resin. Maleic anhydride bonds to metal substrates by creating both covalent and hydrogen bonds. Metal substrates generate oxides on the surface. These oxides are further hydrolysed with water to form hydroxyl groups on the metal surface. Maleic anhydride creates an ester linkage (covalent bonding) to the OH groups on the surface. When maleic anhydride rings open, they generate carboxyl groups. These carboxyl groups bond to the oxides and the hydroxides on the metal surface with hydrogen bonds.
- In order to further enhance the adhesion of the plastic material to the
seamless metal pipe 3, a mechanical etching of the inner surface of theseamless metal pipe 3 may be performed subsequent to steps a4) and a9), respectively, and in advance of steps a5) and a10), respectively. For this purpose, an etching tool (scraper) 301 etches (scrapes) the inner surface of the as extrudedseamless metal pipe 3 so as to increase the surface roughness. - A similar mechanical etching step may be conducted subsequent to step b) and in advance of step c).
- As a final step of the above first and second methods, collecting the seamless multilayer composite pipe 1, for instance by coiling, may be provided.
- The structure of the
apparatus FIG. 2 toFIG. 5 , andFIG. 6 toFIG. 9 , respectively. - The
apparatus seamless metal pipe 3 with at least onecontinuous layer 5 covering its inner surface, and aunit seamless metal pipe 3 by cold working. - In the
apparatus 100 for manufacturing a seamless multilayer composite pipe 1 the unit for providing theseamless metal pipe 3 with the at least onecontinuous layer 5 covering its inner surface is comprised of - a hot-
extrusion die 101 for extruding a metal material into a pipe shape, - a tube shaped supporting
member 103 comprising, in its interior, achannel 111 for adhesive hot melt, achannel 113 for the material for thecontinuous layer 5, and achannel 115 for air supply, thechannels member 103 serving for guiding and supporting the as-extrudedseamless metal pipe 3, - a
cooling tube 105 provided around the tube shaped supportingmember 103 for guiding and supporting the hotseamless metal pipe 3, and - a
co-extrusion head 107, which is located in the direction of extrusion at the end of the tube shaped supportingmember 103, the distance d between the hot-extrusion die 101 and theco-extrusion head 107 being adjustable depending on the technical requirements, and the length of thecooling tube 105 being adaptable to the distance d. - By the
co-extrusion head 107 the adhesive hot melt and the material for thecontinuous layer 5 are applied onto the inner surface of theseamless metal pipe 3 through thechannels co-extrusion head 107 is given inFIG. 4 . - In the
apparatus 200 for manufacturing a seamless multilayer composite pipe 1, the unit for providing theseamless metal pipe 3 with the at least onecontinuous layer 5 covering its inner surface is comprised of a hot-extrusion die 201 for extruding a metal material into a pipe shape, - a tube shaped supporting
member 203 comprising, in its interior, achannel 211 for adhesive hot melt and achannel 215 for air supply, thechannels member 203 serving for guiding and supporting the as-extrudedseamless metal pipe 3, as illustrated inFIG. 7 , - a
cooling tube 205 provided around the tube shaped supportingmember 203 for guiding and supporting the hotseamless metal pipe 3, and - a
co-extrusion head 207, which is located in the direction of extrusion at the end of the tube shaped supportingmember 203, the distance d between the hot-extrusion die 201 and theco-extrusion head 207 being adjustable depending on the technical requirements, and the length of thecooling tube 205 being adaptable to the distance d. - Through the
channels extrusion head 207. Moreover, a pre-extruded layer (preferably a plastic pipe) is supplied to theextrusion head 207 in the centre of the tube shaped supportingmember 203. - By the
extrusion head 207, the adhesive hot melt is applied onto the inner surface of theseamless metal pipe 3 through thechannel 211. A detailed view of theextrusion head 207 is given inFIG. 8 . - The adjustment of the distance d of the
co-extrusion head extrusion die co-extrusion head cooling tube - The tube shaped supporting
member - The tube shaped supporting
member co-extrusion head seamless metal pipe 3 if they are sized so that they are in contact with the inner surface of theseamless metal pipe 3. - At a predetermined distance from the
co-extrusion head unit seamless metal pipe 3 by cold working is provided. This unit is preferably a sinking die. A detailed view showing the sinking die 109 is given inFIG. 5 , a detailed view showing the sinking die 209 is given inFIG. 9 . - Remote from the
unit continuous layer 7 onto the outer surface of theseamless metal pipe 3. - In addition, an etching tool (scraper) 301 may be provided subsequent to the hot-
extrusion die FIG. 10 , in order to mechanically etch the inner surface of theseamless metal pipe 3 so as to increase its roughness. A similar etching tool (not shown) may be provided subsequent to theunit seamless metal pipe 3. - The multilayer composite pipe 1 according to the present invention comprises a
seamless metal pipe 3 with at least onecontinuous layer 5 covering its inner surface, wherein thecontinuous layer 5 covering the inner surface of the aseamless metal pipe 3 is mechanically compressed. Namely, the seamless multilayer composite pipe 1 is subjected after its manufacture to cold working in order to reduce the diameter of theseamless metal pipe 3 so as to obtain a desired dimension. - While subjecting the
seamless metal pipe 3 to cold working, a compressive stress is applied to thecontinuous layer 5 covering the inner surface, thereby enhancing the tight adhesion of thecontinuous layer 5 to theseamless metal pipe 3 even in case the final multilayer composite pipe 1 is bent during its application. Thecontinuous layer 5 is preferably made of plastic. - In order to further improve the adhesion of the inner
continuous layer 5 to theseamless metal pipe 3, anadhesive layer 9 a may be provided therebetween. - Aluminium or an aluminium alloy (referred to in the following as “Al-based material”) is preferably used for the
seamless metal pipe 3. In particular, the aluminium or aluminium alloy is suitably selected from the 1000 series (e.g., 1050, 1070, etc.), 3000 series (e.g., 3003, 3103, etc.) 6000 series (e.g., 6060, 6061, etc.) and 8000 series (e.g. 8011, etc.). - After having finished the cold working of the
seamless metal pipe 3, acontinuous layer 7, preferably of plastic, covering the outer surface may be provided on theseamless metal pipe 3. Preferably, thiscontinuous layer 7 is adhered to the outer surface of theseamless metal pipe 3 via anadhesive layer 9 b. A preferred embodiment of the seamless multilayer composite pipe 1 is shown inFIG. 1 . - The method of manufacturing a seamless multilayer composite pipe 1 according to the present invention is simple, involves fewer steps and avoids complicated precision operations such as wrapping and welding, resulting in a significant reduction of production costs.
- The seamless multilayer composite pipe 1 can be produced in indefinite lengths to suit any requirements.
- The elimination of the weld line in comparison to prior art products results in higher pressure resistance, since the metal material close to the weld line (heat-affected zone) is weaker that the base metal material.
- The thickness of each of the layers, especially that of the seamless
meta pipe 3, can be produced within a wider range of values than by the known methods. - The
co-extrusion head seamless metal pipe 3 has dropped to an acceptable level. - The seamless multilayer composite pipe 1 can be made flexible or rigid, depending on specific requirements by choosing the thickness for each of the coaxial layers, as well as choosing the amount of cold working during the sinking pass.
- The robustness of the seamless multilayer composite pipe 1 dictated by the adhesion of the individual layers, is improved during the sinking pass due to the prevailingly resultant compression forces.
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/053907 WO2008128571A2 (en) | 2007-04-20 | 2007-04-20 | Seamless multilayer composite pipe |
Publications (2)
Publication Number | Publication Date |
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US20100101292A1 true US20100101292A1 (en) | 2010-04-29 |
US8365568B2 US8365568B2 (en) | 2013-02-05 |
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Application Number | Title | Priority Date | Filing Date |
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US12/530,600 Active 2028-12-29 US8365568B2 (en) | 2007-04-20 | 2007-04-20 | Seamless multilayer composite pipe |
Country Status (6)
Country | Link |
---|---|
US (1) | US8365568B2 (en) |
EP (1) | EP2139624B1 (en) |
AU (1) | AU2007351716A1 (en) |
CA (1) | CA2684541A1 (en) |
ES (1) | ES2624481T3 (en) |
WO (1) | WO2008128571A2 (en) |
Cited By (11)
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US20130263961A1 (en) * | 2012-04-04 | 2013-10-10 | Lordo America, Inc. | Composite pipe having improved bonding strength between heterogeneous materials, and apparatus and method of manufacturing the same |
US20130319570A1 (en) * | 2011-02-24 | 2013-12-05 | Uponor Innovation Ab | Making pipe for liquid conveyance |
US20170030492A1 (en) * | 2016-06-23 | 2017-02-02 | Kangtai Plastic Science & Technology Group Co., Ltd. | Wear-heat-resistant anti-bacterial anti-fouling steel wire framed pipe and manufacturing method thereof |
CN109821925A (en) * | 2019-01-29 | 2019-05-31 | 张正周 | A kind of production technology of composite pipe |
US20200400251A1 (en) * | 2019-03-26 | 2020-12-24 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
CN113305166A (en) * | 2021-04-10 | 2021-08-27 | 桂林理工大学 | Diameter-expanding hot extrusion process for bimetal alloy steel composite pipe |
US20220212430A1 (en) * | 2019-05-30 | 2022-07-07 | Pirelli Tyre S.P.A. | Process and apparatus for building tyres for vehicle wheels and tyres obtainable therefrom |
US11466799B2 (en) | 2019-03-26 | 2022-10-11 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
US11466798B2 (en) | 2019-03-26 | 2022-10-11 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
US11480271B2 (en) | 2019-03-26 | 2022-10-25 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
US11846370B2 (en) | 2019-03-26 | 2023-12-19 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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MX2011002444A (en) | 2010-03-31 | 2012-01-04 | Halcor Metal Works S A | Seamless composite metal tube and method of manufacturing the same. |
EP2930496B8 (en) | 2014-04-10 | 2021-12-15 | Horiba France SAS | Raman micro-spectrometry system and method for analyzing microscopic objects in a fluidic sample |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3720557A (en) * | 1970-03-24 | 1973-03-13 | Pirelli | Process for lining conductive tubes with insulating material |
US20050178000A1 (en) * | 2004-02-13 | 2005-08-18 | 3M Innovative Properties Company | Method for making metal cladded metal matrix composite wire |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2274795B (en) | 1993-02-06 | 1997-01-22 | Keith John Kingham | Method and apparatus for producing non-ferrous metal clad 2,3 and 4-part composite products |
EP1815918A1 (en) | 2006-02-03 | 2007-08-08 | Uponor Innovation Ab | Making an elongated product |
ES2657634T3 (en) | 2006-09-02 | 2018-03-06 | Uponor Innovation Ab | Procedure for manufacturing an elongated cylindrical part |
-
2007
- 2007-04-20 CA CA002684541A patent/CA2684541A1/en not_active Abandoned
- 2007-04-20 WO PCT/EP2007/053907 patent/WO2008128571A2/en active Application Filing
- 2007-04-20 AU AU2007351716A patent/AU2007351716A1/en not_active Abandoned
- 2007-04-20 EP EP07728365.3A patent/EP2139624B1/en active Active
- 2007-04-20 ES ES07728365.3T patent/ES2624481T3/en active Active
- 2007-04-20 US US12/530,600 patent/US8365568B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3720557A (en) * | 1970-03-24 | 1973-03-13 | Pirelli | Process for lining conductive tubes with insulating material |
US20050178000A1 (en) * | 2004-02-13 | 2005-08-18 | 3M Innovative Properties Company | Method for making metal cladded metal matrix composite wire |
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US20130319570A1 (en) * | 2011-02-24 | 2013-12-05 | Uponor Innovation Ab | Making pipe for liquid conveyance |
AU2012219556B2 (en) * | 2011-02-24 | 2016-11-10 | Uponor Innovation Ab | Making multilayer composite pipe for liquid conveyance |
US9951891B2 (en) * | 2011-02-24 | 2018-04-24 | Uponor Innovation Ab | Making pipe for liquid conveyance |
US20130263961A1 (en) * | 2012-04-04 | 2013-10-10 | Lordo America, Inc. | Composite pipe having improved bonding strength between heterogeneous materials, and apparatus and method of manufacturing the same |
US20170030492A1 (en) * | 2016-06-23 | 2017-02-02 | Kangtai Plastic Science & Technology Group Co., Ltd. | Wear-heat-resistant anti-bacterial anti-fouling steel wire framed pipe and manufacturing method thereof |
US9989188B2 (en) * | 2016-06-23 | 2018-06-05 | Kangtai Plastic Science & Technology Group Co., Ltd. | Wear-heat-resistant anti-bacterial anti-fouling steel wire framed pipe and manufacturing method thereof |
CN109821925A (en) * | 2019-01-29 | 2019-05-31 | 张正周 | A kind of production technology of composite pipe |
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CN113710946A (en) * | 2019-03-26 | 2021-11-26 | 泰特弗莱克斯公司 | Multilayer composite pipe and piping assembly having reflective insulation |
US11466799B2 (en) | 2019-03-26 | 2022-10-11 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
US20200400251A1 (en) * | 2019-03-26 | 2020-12-24 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
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GB2614467B (en) * | 2019-03-26 | 2023-09-27 | Titeflex Corp | Multilayer composite pipe and pipe assemblies including reflective insulation |
US11846370B2 (en) | 2019-03-26 | 2023-12-19 | Titeflex Corporation | Multilayer composite pipe and pipe assemblies including reflective insulation |
GB2594624B (en) * | 2019-03-26 | 2024-01-31 | Titeflex Corp | Multilayer composite pipe and pipe assemblies including reflective insulation |
GB2614468B (en) * | 2019-03-26 | 2024-03-06 | Titeflex Corp | Multilayer composite pipe and pipe assemblies including reflective insulation |
US20220212430A1 (en) * | 2019-05-30 | 2022-07-07 | Pirelli Tyre S.P.A. | Process and apparatus for building tyres for vehicle wheels and tyres obtainable therefrom |
CN113305166A (en) * | 2021-04-10 | 2021-08-27 | 桂林理工大学 | Diameter-expanding hot extrusion process for bimetal alloy steel composite pipe |
Also Published As
Publication number | Publication date |
---|---|
WO2008128571A2 (en) | 2008-10-30 |
WO2008128571A3 (en) | 2009-02-26 |
CA2684541A1 (en) | 2008-10-30 |
US8365568B2 (en) | 2013-02-05 |
EP2139624A2 (en) | 2010-01-06 |
ES2624481T3 (en) | 2017-07-14 |
AU2007351716A1 (en) | 2008-10-30 |
EP2139624B1 (en) | 2017-03-01 |
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